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CN-122007144-A - Low-disturbance stepped drainage stabilization method and device for tailings pile

CN122007144ACN 122007144 ACN122007144 ACN 122007144ACN-122007144-A

Abstract

The invention discloses a low-disturbance step-by-step drainage stabilization method and device for a tailing heap body, which comprise the steps of dividing the tailing heap body into a plurality of blocks, introducing drainage guide pipes into each block, paving a sodium bentonite pad on the surface of the tailing heap body, paving a soil layer above the sodium bentonite pad, planting Siberian iris on the soil layer, collecting and directionally guiding seepage liquid and seepage acid gas in each block through the drainage guide pipes, introducing biological bacteria/stabilization agents and the like into each block through the drainage guide pipes. Compared with the prior art, the invention realizes unpowered condition seepage liquid and seepage acid gas dead angle-free collection and efficient directional guide and discharge through the negative pressure drainage seepage liquid/gas guide and discharge technology, and simultaneously the positive pressure grouting pile body continuous stabilization technology realizes accurate control of the medicine dosage in the stabilization process, solves the problem of acid material rebound caused by continuous acidification after neutralization of acid tailings, and prevents in-situ injection induced pile body settlement and landslide disaster.

Inventors

  • WANG LEI
  • WANG XIAOSHU
  • LI SHAOFENG
  • WANG YANGYANG
  • LIU JIN
  • WANG JINSHENG
  • XI BEIDOU

Assignees

  • 深圳职业技术大学

Dates

Publication Date
20260512
Application Date
20251107
Priority Date
20241109

Claims (10)

  1. 1. The low-disturbance stepped drainage stabilization method for the tailings pile is characterized by comprising the following steps of: S100, dividing the tailing heap body into a plurality of blocks, and paving a three-dimensional drainage guide pipe network in each block to cover all areas of the tailing heap body; S200, paving a 50cm sodium bentonite pad on the surface of the tailing pile, paving a soil layer above the sodium bentonite pad, and planting Siberian iris on the soil layer; S300, carrying out negative pressure collection and directional drainage on seepage liquid and seepage acid gas in each block through a drainage pipe; S400, pumping in stabilizing agents, biological agents and the like into each block through the drainage guide tube.
  2. 2. The method for stabilizing a tailings pond according to claim 1, wherein in step S100: the drainage guide pipes in each block are provided with solenoid valve switches, a sensor is arranged below the switches, the water content and the gas pressure in the block are detected in real time, the sensor signals exceed a set threshold value, and the opening and closing of the pipeline are automatically controlled.
  3. 3. The method for stabilizing a tailings pond according to claim 2, wherein in step S400: the biological agent is desulfurization bacteria Desulfovibrio desulfuicans and geobacillus Geobacter sulfurreducens, and the ratio is 1:1-1:2.
  4. 4. A tailings pond body low disturbance step-by-step drainage stabilization method according to claim 3, characterized in that, in said step S400: the stabilizing agent is prepared by the following method: under the alkaline excitation of calcium oxide, halogen (F - , 1.25A) in the fluorogypsum replaces O 2 - (1.32A) with similar ionic radius in a silicon oxygen tetrahedron by taking superfine tailings, stack tailings, industrial waste steel slag and fluorogypsum as raw materials and an exciting agent, and accelerating hydration to generate rod-shaped ettringite and an intermediate AFm phase.
  5. 5. The method for stabilizing low-disturbance stepped drainage of tailings piles according to claim 4, wherein the treatment method of the seepage liquid and the seepage acid gas collected in the step S300 comprises the following steps: s310, adding water-soluble silicate and ball-milling steel slag particles into the seepage liquid, and then pumping seepage acid gas through a nano aerator; s311, introducing the gas-liquid mixture obtained in the step 310 into a metal-rich biochar catalyst and a stabilizing agent; and S312, introducing the gas-liquid mixture obtained in the step 311 into quicklime.
  6. 6. The method for stabilizing a tailings pond according to claim 5, wherein in step S310: the adding ratio of the water-soluble silicate to the ball-milling steel slag particles is 5:1-10:1, and the nano aeration time is 5-30min.
  7. 7. The method for stabilizing a tailings pond according to claim 5, wherein in step S310: The water-soluble silicate is one or two of-SiO 3 2- or-Si 2 O 5 2- water-soluble silicic acid.
  8. 8. The method for stabilizing a tailings pond according to claim 5, wherein in step S311: the metal-rich biochar catalyst is prepared by the following method: planting Siberian iris plant in the soil on the surface layer of the tailing pile, adding metal ion nutrient solution and sulfate radical and phosphate radical nutrient solution into the soil, culturing for two months, and harvesting; washing, drying and crushing the dried Siberian iris in 1mmol/L hydrochloric acid solution; calcining the crushed Siberian iris under the condition of 900 ℃ to obtain the metal-rich biochar catalyst.
  9. 9. The method for stabilizing the tailings pile low-disturbance stepped drainage according to claim 8, wherein the metal ion nutrient solution comprises nickel, cobalt, lead, copper and zinc ions.
  10. 10. A tailings heap low-disturbance step-by-step drainage stabilization device, which is characterized by being constructed by the tailings heap low-disturbance step-by-step drainage stabilization method according to any one of claims 1-9.

Description

Low-disturbance stepped drainage stabilization method and device for tailings pile Technical Field The invention belongs to the technical field of tailing heap body treatment, and particularly relates to a low-disturbance step-by-step drainage stabilization method and device for a tailing heap body. Background Tailings are one of the products of the sorting operation in beneficiation, wherein the portion with the lowest level of useful target components is called tailings. Under current technical and economic conditions, further sorting is not suitable, and therefore the tailings are piled up at a certain place for future use. However, the tailings are not completely useless waste materials, often contain components which can be used for other purposes, and can be comprehensively utilized. Therefore, tailings are treasures to be dug, and the current task of the mining recycling economy in China is to develop and utilize a large amount of tailings piled for a long time. However, aiming at the problems that acid wastewater and waste gas are generated by oxidation of metal sulfides in a tailings pile body, the pile body is decomposed and collapsed, and then geological disasters are induced, the conventional technology adopts heavy pebbles to construct a water-guiding and gas-guiding reverse filtering structure, adopts high-pressure rotary spraying and other processes to perform in-situ stirring neutralization, but adopts high-pressure rotary spraying and other processes to perform in-situ stirring neutralization, the problems of pile body disturbance and geological disasters are caused, and the problems of continuous oxidation and acidification of the sulfides after neutralization and acid material rebound cannot be solved. In view of this, the present invention has been made. Disclosure of Invention The invention aims to provide a low-disturbance stepped guide and discharge stabilization method and device for a tailings heap body, which are used for solving the technical problems in the background art. In order to achieve one of the above objects, the present invention provides the following technical solutions: a low-disturbance stepped drainage stabilization method for a tailing pile comprises the following steps: S100, dividing the tailing heap body into a plurality of blocks, and paving a three-dimensional drainage guide pipe network in each block to cover all areas of the tailing heap body; S200, paving a 50cm sodium bentonite pad on the surface of the tailing pile, paving a soil layer above the sodium bentonite pad, and planting Siberian iris on the soil layer; S300, carrying out negative pressure collection and directional drainage on seepage liquid and seepage acid gas in each block through a drainage pipe; S400, pumping in stabilizing agents, biological agents and the like into each block through the drainage guide tube. Preferably, in said step S100: the drainage guide pipes in each block are provided with solenoid valve switches, a sensor is arranged below the switches, the water content and the gas pressure in the block are detected in real time, the sensor signals exceed a set threshold value, and the opening and closing of the pipeline are automatically controlled. Preferably, in said step S400: the biological agent is desulfurization bacteria Desulfovibrio desulfuicans and geobacillus Geobacter sulfurreducens, and the ratio is 1:1-1:2. Preferably, in said step S400: the stabilizing agent is prepared by the following method: under the alkaline excitation of calcium oxide, halogen (F -, 1.25A) in the fluorogypsum replaces O 2- (1.32A) with similar ionic radius in a silicon oxygen tetrahedron by taking superfine tailings, stack tailings, industrial waste steel slag and fluorogypsum as raw materials and an exciting agent, and accelerating hydration to generate rod-shaped ettringite and an intermediate AFm phase. Preferably, the method for treating the permeate and the permeate acid gas collected in step S300 includes: s310, adding water-soluble silicate and ball-milling steel slag particles into the seepage liquid, and then pumping seepage acid gas through a nano aerator; s311, introducing the gas-liquid mixture obtained in the step 310 into a metal-rich biochar catalyst and a stabilizing agent; and S312, introducing the gas-liquid mixture obtained in the step 311 into quicklime. Preferably, in said step S310: the adding ratio of the water-soluble silicate to the ball-milling steel slag particles is 5:1-10:1, and the nano aeration time is 5-30min. Preferably, in said step S310: The water-soluble silicate is one or two of-SiO 32- or-Si 2O52- water-soluble silicic acid. Preferably, in said step S311: the metal-rich biochar catalyst is prepared by the following method: planting Siberian iris plant in the soil on the surface layer of the tailing pile, adding metal ion nutrient solution and sulfate radical and phosphate radical nutrient solution into the soil, culturing for two months, and harvesting; w